The Colorado Department of Transportation (CDOT, pronounced See Dot) is the principal department of the Colorado state government that administers state government transportation responsibilities in the state. CDOT is responsible for maintaining 9,144 mile highway system, including 3,429 bridges with over 28 billion vehicle miles of travel per year. CDOT's Mission is "To provide the best multi-modal transportation system for Colorado that most effectively moves people, goods, and information."
1909 - The first highway bill was passed by forming a three-member Highway Commission to approve work and allocate funds.
1917 - The State Highway Fund was created and the State Highway Department was formed.
1968 - The legislation reorganized highway matters and created the Colorado Department of Highways (CDOH) with 3 main divisions: Division of Highways, Division of Planning and Research, and Division of Patrol